| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.lib.util; |
| |
| import java.lang.reflect.Field; |
| import java.security.AccessController; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Test UUID generation. |
| * |
| * @author Abe White |
| */ |
| public class TestUUIDGenerator { |
| |
| @Test |
| public void testUniqueString() { |
| Set seen = new HashSet(); |
| for (int i = 0; i < 10000; i++) |
| assertTrue(seen.add( |
| UUIDGenerator.nextString(UUIDGenerator.TYPE1))); |
| } |
| |
| @Test |
| public void testUniqueHex() { |
| Set seen = new HashSet(); |
| for (int i = 0; i < 10000; i++) |
| assertTrue(seen.add( |
| UUIDGenerator.nextHex(UUIDGenerator.TYPE1))); |
| } |
| |
| @Test |
| public void testUniqueType4String() { |
| Set seen = new HashSet(); |
| for (int i = 0; i < 10000; i++) |
| assertTrue(seen.add( |
| UUIDGenerator.nextString(UUIDGenerator.TYPE4))); |
| } |
| |
| @Test |
| public void testUniqueType4Hex() { |
| Set seen = new HashSet(); |
| for (int i = 0; i < 10000; i++) |
| assertTrue(seen.add( |
| UUIDGenerator.nextHex(UUIDGenerator.TYPE4))); |
| } |
| |
| @Test |
| public void testUniqueMixedTypesHex() { |
| Set seen = new HashSet(); |
| for (int i = 0; i < 10000; i++) { |
| int type = (i % 2 == 0) ? |
| UUIDGenerator.TYPE4 : UUIDGenerator.TYPE1; |
| assertTrue(seen.add( |
| UUIDGenerator.nextHex(type))); |
| } |
| } |
| |
| @Test |
| public void testGetTime() { |
| long time = 0; |
| for (int i = 0; i < 10000; i++) { |
| long newTime = UUIDGenerator.getTime(); |
| assertTrue(newTime != time); |
| time = newTime; |
| } |
| } |
| |
| @Test |
| public void testInitType1MultiThreaded() throws Exception { |
| // This test method depends IP and RANDOM in UUIDGenerator to be null |
| // and type1Initialized to be false. Using reflection to ensure that |
| // those fields are null. Wrap this method in doPrivledgedAction so it |
| // doesn't fail when running with security. |
| AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() { |
| @Override |
| public Object run() throws Exception { |
| Class uuid = UUIDGenerator.class; |
| Field[] fields = uuid.getDeclaredFields(); |
| for (Field f : fields) { |
| if (f.getName().equals("type1Initialized")) { |
| f.setAccessible(true); |
| f.set(null, false); |
| } else if (f.getName().equals("IP") || f.getName().equals("RANDOM")) { |
| f.setAccessible(true); |
| f.set(null, null); |
| } |
| } |
| Thread t = new Thread() { |
| @Override |
| public void run() { |
| UUIDGenerator.createType1(); |
| } |
| }; |
| |
| t.start(); |
| UUIDGenerator.createType1(); |
| return null; |
| } |
| }); |
| }// end testInitType1MultiThreaded |
| } |